Vulnerabilities CVE-2026-44990

CVE-2026-44990

Critical

Open

TLP:CLEAR

Apostrophe has default XSS via `xmp` raw-text passthrough in `sanitize-html`

NVD CVE.org

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Description

ApostropheCMS is an open-source Node.js content management system, and sanitize-html provides a simple HTML sanitizer with a clear API. Under the default configuration, versions of `sanitize-html` prior to 2.17.4 can turn attacker-controlled content inside a disallowed `xmp` element into live HTML or JavaScript. This is a sanitizer bypass in the default `disallowedTagsMode: 'discard'` path and can lead to stored XSS in applications that render sanitized output back to users. Version 2.17.4 patches the issue.

Details

CVSS Score: 9.3
EPSS Score ⓘ: 0.51%

41th percentile
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
Confidence: 90%
Published: Jun 12, 2026
Last Modified: Aug 12, 2026

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